2
Instruction Leaflet
IL29C109J
Effective November 2013
Installation Instructions for ND, HND, NDC, CND,
CHND, CNDC Circuit Breakers with Digitrip OPTIM
Trip Unit and Powernet, and/or Zone Interlock
EATON CORPORATION
www.eaton.com
CONTACT WITH ENERGIZED EQUIPMENT CAN
RESULT IN DEATH, SEVERE PERSONAL INJURY,
OR SUBSTANTIAL PROPERTY DAMAGE. DO NOT
NANCE ON EQUIPMENT WHILE IT IS ENERGIZED.
ALWAYS VERIFY THAT NO VOLTAGE IS PRESENT
BEFORE PROCEEDING WITH THE TASK, AND
TY PROCEDURES.
ATTEMPT TO INSTALL OR PERFORM MAINTE-
ALWAYS FOLLOW GENERALLY ACCEPTED SAFE-
EATON IS NOT LIABLE FOR THE MISAPPLICATION
MISINSTALLATION OF ITS PRODUCTS.
The user is cautioned to observe all recommendations,
warnings and cautions relating to the safety of person-
nel and equipment as well as general and local health
and safety laws, codes and procedures.
The recommendations and information contained herein
are based on Eaton experience and judgment, but should
not be considered to be all-inclusive or covering every
application or circumstance which may arise. If any que-
stions arise, contact Eaton for further information or
instructions.
Figure 1-1 N-Frame OPTIM Series C Circuit Breaker
Frame(OPTIM 750, 1050 shown, the Model
550 has no Side Bracket)
1.0
INTRODUCTION
General Information
The N-frame OPTIM Series C circuit breaker (Figure
1-1)
types ND, HND, and NDC are 600 VAC maximum
rated devices with Digitrip OPTIM Models 550, 750 or
1050 trip units rated 800A or 1200A maximum continu-
ous current. They are for AC applications only and can
be reverse fed. They are listed in accordance with
Underwriters Laboratories, Inc. Standard UL 489 and
satisfy the requirements of International Electrotechnical
Commission Recommendations No. IEC 947-2. OPTIM
750 and 1050 N-Frame circuit breakers are equipped
with zone interlocking and an auxiliary switch and alarm
(signal)/lockout switch for customer usage. Other inter-
nal accessories are available but must be factory
installed since they are factory sealed. Model 550 is not
sealed and can accommodate field installed acces-
sories, including an IMPACC communications kit.
Contact Eaton for the following information and user manuals:
N-Frame and Accessories Selection Data 29-120N
Instructions and Overview of OPTIM
Trip Units
Instructions on the Operation of Digitrip
OPTIMIZER Hand Held Programmer
Instructions on the Operation of Digitrip
Breaker Interface Module
Instructions on the Operation of Digitrip
OPTIM Trip Units
Digitrip OPTIM Wiring Diagrams
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-167N
100 Percent Rated N-frame Circuit Breakers
CND, CHND, and CNDC circuit breakers are suitable for
continuous operation at 100 percent of the frame rating
in an enclosure which measures at least 42” height,
22.75” width and 11.5” depth. The 800A version
requires no ventilation. The 1200A version requires 224
sq. in. of ventilation on the front face of the enclosure
(72 sq. in. top, 72 sq. in. bottom, 40 sq. in. left and 40
sq. in. right). The 1200A version has to be used with the
supplied conductor extensions and terminal barriers as
shown in Figure 2-2. Use only 90°C rated wire with
ampacity based on 75°C rated conductors. Use Copper
only or
terminals only.
!
WARNING
